MAX8804V

High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN

Industry's Smallest Dual Input Li+ Chargers Withstand 30V DC with Thermal Regulation, Allowing for Safest and Fastest Charging

Data Sheet (Rev. 2)

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Overview

Complete Chargers for Single-Cell Li+ Battery
Dual-Input, 30V AC Adapter/16V USB
No External FET, Blocking Diode, or Sense Resistor Required
Automatic USB/AC Adapter Input Selection
Easy Programmable Fast-Charge Current and Top-Off Threshold
Proprietary Die Temperature Regulation Control
±5% Fast-Charge Current-Limit Accuracy
Battery Pack Detection Input (MAX8804V/MAX8804W)
Power-Present and Charger-Status Outputs
No Prequalification Charge (MAX8804Y)
Tiny 2mm x 3mm Thermally Enhanced TDFN Package
USB Charging

The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z intelligent, dual-input, stand-alone, constant-current, constant-voltage (CCCV), thermally regulated linear chargers are designed for a single-cell lithium-ion (Li+) battery. They integrate the current-sense circuit, MOS pass element, thermal-regulation circuitry, and overvoltage protection (OVP), and eliminate the reverse-blocking Schottky diode.

The MAX8804V/MAX8804W/MAX8804Z function as stand-alone chargers to control the charging sequence from the prequalification state through fast-charge, topoff charge, and full-charge indication. The MAX8804Y eliminates the prequalification state to allow startup into a load without a battery. Proprietary thermal-regulation circuitry limits the die temperature when fast-charging or while exposed to high ambient temperatures, allowing maximum charging current without damaging the IC.

The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z achieve high flexibility by providing an adjustable DC/USB fast-charge current through a simple single-wire interface (SET input). The chargers automatically select between either a USB or AC adapter input source. The AC adapter charge current is programmable from 400mA to 700mA in 50mA steps through a serial interface. The USB charge current is programmable to 95mA, 380mA, or 475mA through the same interface. Other features include an active-low battery charging-status indicator (active-low CHG), an active-low power-OK indicator (active-low POK), an active-low USB input detection output (active-low USBPWR) on the MAX8804Y/MAX8804Z, and battery pack detection (DETBAT) on the MAX8804V/MAX8804W.

The MAX8804V has 120mA, 140mA, 180mA, and 200mA active-low CHG top-off threshold settings, while the MAX8804W/MAX8804Y/MAX8804Z have 70mA, 80mA, 90mA, and 100mA. The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z accept a 4.15V to 30V DC source voltage or a 4.15V to 16V USB input voltage, but disable charging when either input voltage exceeds 7.5V to protect against unqualified or faulty input sources. The MAX8804V/MAX8804W/MAX8804Y/MAX8804Z operate over the extended temperature range (-40°C to +85°C) and are available in a tiny 8-pin thermally enhanced 2mm x 3mm TDFN package.

Applications

Cell Phones/Smartphones
Digital Cameras
MP3 Players
Other Handheld Devices
Portable Media Players

Documentation

Data Sheet 1

MAX8804-MAX8804Z: High-Voltage, Dual-Input, USB/AC Adapter Chargers in 2mm x 3mm TDFN Data Sheet (Rev.2) 05/01/2008

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Battery Charger ICs 3
MAX1898	PRODUCTION	Linear Charger for Single-Cell Li+ Battery
MAX1508	PRODUCTION	Linear Li+ Battery Charger with Integrated Pass FET, Thermal Regulation, and ACOK Flag in 3mm x 3mm TDFN
MAX1507	PRODUCTION	Linear Li+ Battery Charger with Integrated Pass FET and Thermal Regulation in 3mm x 3mm Thin DFN
Interface Transceivers & Isolators 1
MAX1501	PRODUCTION	Highly Integrated, Linear Battery Charger with Thermal Regulation for Portable Applications

Evaluation Kits

Evaluation Kit for the MAX8804V, MAX8804W, MAX8804Y, and MAX8804Z

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Features and Benefits

Complete Charger for Single-Cell Li+ Battery
Dual-Input, 30V AC Adapter/16V USB
No External FET, Blocking Diode, or Sense Resistor Required
Automatic USB/AC Adapter Input Selection
Easy Programmable Fast-Charge Current and Top-Off Threshold
Proprietary Die Temperature Regulation Control
±5% Fast-Charge Current-Limit Accuracy
Battery-Pack Detection Input (MAX8804V/MAX8804W)
Power-Present and Charger-Status Outputs
No Prequalification Charge (MAX8804Y)
Tiny 2mm x 3mm Thermally Enhanced TDFN Package
Fully Assembled and Tested

Product Details

The MAX8804Z evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the highly integrated MAX8804Z linear battery charger for single-cell lithium-ion (Li+) batteries. The EV kit safely charges a single Li+ battery to 4.2V. The EV kit accepts a 4.15V to 30V DC source voltage or a 4.15V to 16V USB input voltage, but disables charging when either input voltage exceeds 7.5V to protect against unqualified or faulty input sources. A simple single-wire SET input to the EV kit allows the user to enable/disable the charger or program the charge current and top-off threshold. Three LEDs on the EV kit indicate the power-OK, USB power status, and charger status. The MAX8804Z EV kit can also evaluate the MAX8804V/MAX8804W/MAX8804Y. To evaluate the MAX8804V/MAX8804W/MAX8804Y, order a free sample along with this EV kit.